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Questions and Answers
Which one of these is a common characteristic of a step-up transformer?
Which one of these is a common characteristic of a step-up transformer?
- Primary voltage is lower than secondary voltage (correct)
- Primary voltage is unrelated to secondary voltage
- Primary voltage is higher than secondary voltage
- Primary voltage is equal to secondary voltage
What is the advantage of a magnetic disk over magnetic tape?
What is the advantage of a magnetic disk over magnetic tape?
- Faster data transfer speed
- Lower cost
- Higher data capacity
- Easy storage and easy retrieval (correct)
What best represents X leads Y by 270 degrees?
What best represents X leads Y by 270 degrees?
- X leads Y by 180 degrees
- X lags Y by 90 degrees
- X leads Y by 90 degrees (correct)
- X lags Y by 180 degrees
What is the disadvantage of CMOS?
What is the disadvantage of CMOS?
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Why are carbon brushes preferred over copper brushes?
Why are carbon brushes preferred over copper brushes?
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Study Notes
Transformers
- A common characteristic of a step-up transformer is that it increases the voltage of an alternating current.
Magnetic Storage
- A magnetic disk has the advantage of faster access time and random access capability over magnetic tape, which has sequential access.
Phasors
- X leads Y by 270 degrees represents a phase shift of 270 degrees or 3Ï€/2 radians.
Integrated Circuits
- A disadvantage of CMOS (Complementary Metal-Oxide-Semiconductor) is that it can be susceptible to electrostatic discharge damage.
Brushes
- Carbon brushes are preferred over copper brushes because they are less likely to spark, which can be a safety issue in certain applications.
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